Please could you clarify the above? As far as I know, the Roll Up Data server task requires a network connection to the databases it is rolling up from, which it cannot have if the target server is on an isolated network. Indeed, the Roll Up Data server task requires a registered ePO server, which it will not have as the registration process would fail due to the target server being on an isolated network...
As a quick aside, following on from my comment above, I cant think of a situation where you would want to roll up data from an isolated ePO server - the network is isolated for a reason. That said, there are always weird scenarios out there, so there is likely a valid reason for this desire 🙂
We have multiple isolated networks with multiple ePO setups that are rolling up to a centralized ePO mothership. All you need is ports 80/443/1433 open from your central ePO to your isolated network ePO.
Yes, this method DOES require minimal network connection between the two. Otherwise you cannot rollup data between the two through automatic ePO methods.
If you want to do it a manual way, it would require some SQL magic. Basically, the rollup job takes whatever specified events/computers and puts them into the ePORollup_* tables. Basically you would have either copy the DB or create some queries to have a manual process of doing this.